ASTM C843-17

Standard Specification for Application of Gypsum Veneer Plaster

ABSTRACT
This specification covers the minimum requirements for gypsum veneer plaster and includes application methods on systems such as electric heat cable systems but not exceeding a specified temperature. Applicable building code regulations should be followed when a specific degree of fire resistance is required. Plaster and other cementitious materials should be kept dry until these are ready to be used and should be kept off the ground, under cover, and away from damp walls and surfaces.
SCOPE
1.1 This specification covers the minimum requirements for and methods of applying gypsum veneer plaster.  
1.2 Where a specific degree of fire resistance is required for veneer plaster systems, applicable building code regulations shall be followed.  
1.2.1 Details of construction for a specific assembly to achieve the required fire resistance shall be obtained from reports of fire-resistance tests, engineering evaluations, or listings from recognized fire testing laboratories.  
1.3 Where a specific degree of sound control is required for veneer plaster assemblies and constructions, details of construction shall be in compliance with official reports of tests conducted in recognized sound testing laboratories in accordance with the applicable sound tests of Test Methods E90, C423, or E492.  
Note 1: To ensure desirable results, coordinate this specification with Specification C844.
Note 2: General information regarding matters of a contractual nature concerning veneer plaster work is found in Appendix X1. Additional technical information related to veneer plastering is provided in Appendix X2.  
1.4 The values stated in inch-pound units are to be regarded as the standard. The values given in parentheses are for information only.  
1.5 The text of this specification references notes and footnotes which provide explanatory material. These notes and footnotes (excluding those in tables and figures) shall not be considered as requirements of the specification.  
1.6 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.

General Information

• Status: Historical
• Publication Date: 30-Apr-2017
• ICS: 91.100.10 - Cement. Gypsum. Lime. Mortar
• Technical Committee: C11 - Gypsum and Related Building Materials and Systems
• Drafting Committee: C11.03 - Specifications for the Application of Gypsum and Other Products in Assemblies

Standards Content (Sample)

NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
Contact ASTM International (www.astm.org) for the latest information
Designation: C843 − 17
Standard Specification for
1
Application of Gypsum Veneer Plaster
This standard is issued under the fixed designation C843; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
This standard has been approved for use by agencies of the U.S. Department of Defense.
1. Scope* mendations issued by the World Trade Organization Technical
Barriers to Trade (TBT) Committee.
1.1 This specification covers the minimum requirements for
and methods of applying gypsum veneer plaster.
2. Referenced Documents
2
1.2 Where a specific degree of fire resistance is required for
2.1 ASTM Standards:
veneer plaster systems, applicable building code regulations
C11 Terminology Relating to Gypsum and Related Building
shall be followed.
Materials and Systems
1.2.1 Details of construction for a specific assembly to
C423 Test Method for Sound Absorption and Sound Absorp-
achieve the required fire resistance shall be obtained from
tion Coefficients by the Reverberation Room Method
reports of fire-resistance tests, engineering evaluations, or
C587 Specification for Gypsum Veneer Plaster
listings from recognized fire testing laboratories.
C588/C588M Specification for Gypsum Base for Veneer
3
Plasters (Withdrawn 2005)
1.3 Where a specific degree of sound control is required for
C631 Specification for Bonding Compounds for Interior
veneer plaster assemblies and constructions, details of con-
Gypsum Plastering
struction shall be in compliance with official reports of tests
C844 Specification for Application of Gypsum Base to
conducted in recognized sound testing laboratories in accor-
Receive Gypsum Veneer Plaster
dance with the applicable sound tests of Test Methods E90,
C1047 Specification for Accessories for Gypsum Wallboard
C423, or E492.
and Gypsum Veneer Base
NOTE 1—To ensure desirable results, coordinate this specification with
E90 Test Method for Laboratory Measurement of Airborne
Specification C844.
Sound Transmission Loss of Building Partitions and
NOTE 2—General information regarding matters of a contractual nature
Elements
concerning veneer plaster work is found in Appendix X1. Additional
technical information related to veneer plastering is provided in Appendix E492 Test Method for Laboratory Measurement of Impact
X2.
Sound Transmission Through Floor-Ceiling Assemblies
Using the Tapping Machine
1.4 The values stated in inch-pound units are to be regarded
as the standard. The values given in parentheses are for
3. Terminology
information only.
3.1 Definitions:
1.5 The text of this specification references notes and
3.1.1 See Terminology C11.
footnotes which provide explanatory material. These notes and
3.2 Definitions of Terms Specific to This Standard:
footnotes (excluding those in tables and figures) shall not be
3.2.1 base coat, n—veneer plaster trowel or machine ap-
considered as requirements of the specification.
plied as the first coat of a two-component system.
1.6 This international standard was developed in accor-
3.2.2 finish coat, n—veneer finish plaster trowel or machine
dance with internationally recognized principles on standard-
applied as the second coat over the base coat plaster in a
ization established in the Decision on Principles for the
two-component system.
Development of International Standards, Guides and Recom-
3.2.2.1 smooth-trowel finish, n—a finish resulting from steel
troweling with a minimum of water after the plaster has
1
This specification is under the jurisdiction of ASTM Committee C11 on
2
Gypsum and Related Building Materials and Systems and is the direct responsibility For referenced ASTM standards, visit the ASTM website, www.astm.org, or
of Subcommittee C11.03 on Specifications for the Application of Gypsum and Other contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM
Products in Assemblies. Standards volume information, refer to the standard’s Document Summary page on
Current edition approved May 1, 2017. Published May 2017. Originally the ASTM website.
3
approved in 1976. Last previous edition approved in 2012 as C843 – 99 (2012). The last approved version of this historical standard is referenced on
DOI: 10.1520/C0843-17. www.astm.org.
*A Summary of Changes section appears at the end of this standard
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1

---------------------- Page: 1 ----------------------
C843 − 17
become firm. A smooth finish free of trowel marks, blemishes, 7. Materials
or other imperfections.
7.1 Gypsum Base for Veneer Plasters (hereinafter referred
...

This document is not an ASTM standard and is intended only to provide the user of an ASTM standard an indication of what changes have been made to the previous version. Because
it may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior editions as appropriate. In all cases only the current version
of the standard as published by ASTM is to be considered the official document.
Designation: C843 − 99 (Reapproved 2012) C843 − 17
Standard Specification for
1
Application of Gypsum Veneer Plaster
This standard is issued under the fixed designation C843; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
This standard has been approved for use by agencies of the U.S. Department of Defense.
1. Scope Scope*
1.1 This specification covers the minimum requirements for and methods of applying gypsum veneer plaster.
1.2 Where a specific degree of fire resistance is required for veneer plaster systems, applicable building code regulations shall
be followed.
1.2.1 Details of construction for a specific assembly to achieve the required fire resistance shall be obtained from reports of
fire-resistance tests, engineering evaluations, or listings from recognized fire testing laboratories.
1.3 Where a specific degree of sound control is required for veneer plaster assemblies and constructions, details of construction
shall be in compliance with official reports of tests conducted in recognized sound testing laboratories in accordance with the
applicable sound tests of Test Methods E90, C423, or E492.
NOTE 1—To ensure desirable results, coordinate this specification with Specification C844.
NOTE 2—General information regarding matters of a contractual nature concerning veneer plaster work is found in Appendix X1. Additional technical
information related to veneer plastering is provided in Appendix X2.
1.4 The values stated in inch-pound units are to be regarded as the standard. The values given in parentheses are for information
only.
1.5 The text of this specification references notes and footnotes which provide explanatory material. These notes and footnotes
(excluding those in tables and figures) shall not be considered as requirements of the specification.
1.6 This international standard was developed in accordance with internationally recognized principles on standardization
established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued
by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
2. Referenced Documents
2
2.1 ASTM Standards:
C11 Terminology Relating to Gypsum and Related Building Materials and Systems
C423 Test Method for Sound Absorption and Sound Absorption Coefficients by the Reverberation Room Method
C587 Specification for Gypsum Veneer Plaster
3
C588/C588M Specification for Gypsum Base for Veneer Plasters (Withdrawn 2005)
C631 Specification for Bonding Compounds for Interior Gypsum Plastering
C844 Specification for Application of Gypsum Base to Receive Gypsum Veneer Plaster
C1047 Specification for Accessories for Gypsum Wallboard and Gypsum Veneer Base
E90 Test Method for Laboratory Measurement of Airborne Sound Transmission Loss of Building Partitions and Elements
E492 Test Method for Laboratory Measurement of Impact Sound Transmission Through Floor-Ceiling Assemblies Using the
Tapping Machine
3. Terminology
3.1 Definitions:
3.1.1 See Terminology C11.
1
This specification is under the jurisdiction of ASTM Committee C11 on Gypsum and Related Building Materials and Systems and is the direct responsibility of
Subcommittee C11.03 on Specifications for the Application of Gypsum and Other Products in Assemblies.
Current edition approved March 1, 2012May 1, 2017. Published June 2012May 2017. Originally approved in 1976. Last previous edition approved in 20062012 as
C843C843 – 99 (2012).–99 (2006). DOI: 10.1520/C0843-99R12. 10.1520/C0843-17.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM Standards
volume information, refer to the standard’s Document Summary page on the ASTM website.
3
The last approved version of this historical standard is referenced on www.astm.org.
*A Summary of Changes section appears at the end of this standard
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1

---------------------- Page: 1 ----------------------
C843 − 17
3.2 Definitions of Terms Specific to This Standard:
3.2.1 base coat, n—veneer plaster trowel or machine applied as the first coat of a two-component system.
3.2.2 finish coat, n—veneer finish plaster trowel or machine applied as the second c
...